Use one-liners in specs where possible

spec/views/playlists/edit.html.haml_spec.rb

@@ -1,13 +1,9 @@
 require 'spec_helper'
 
 describe 'playlists/edit' do
-  let(:playlist) do
-    mock_model(Playlist).as_new_record.as_null_object
-  end
+  let(:playlist) { mock_model(Playlist).as_new_record.as_null_object }
 
-  before do
-    assign :playlist, playlist
-  end
+  before { assign :playlist, playlist }
 
   it 'renders a form to edit a playlist' do
     render

spec/views/playlists/index.html.haml_spec.rb

@@ -1,11 +1,7 @@
 require 'spec_helper'
 
 describe 'playlists/index' do
-  before do
-    assign :playlists, [
-      mock_model(Playlist, name: 'Electro')
-    ]
-  end
+  before { assign :playlists, [mock_model(Playlist, name: 'Electro')] }
 
   it 'displays a list of playlists' do
     render

spec/views/playlists/new.html.haml_spec.rb

@@ -1,20 +1,15 @@
 require 'spec_helper'
 
 describe 'playlists/new' do
-  let(:playlist) do
-    mock_model(Playlist).as_new_record.as_null_object
-  end
+  let(:playlist) { mock_model(Playlist).as_new_record.as_null_object }
 
-  before do
-    assign :playlist, playlist
-  end
+  before { assign :playlist, playlist }
 
   it 'renders a form to create a playlist' do
     render
     expect(rendered)
       .to have_selector "form[method=post][action='#{playlists_path}']"
-    expect(rendered)
-      .to have_selector 'input[type=submit]'
+    expect(rendered).to have_selector 'input[type=submit]'
   end
 
   it 'renders a text field with a label for the playlists name' do
@@ -22,7 +17,6 @@ describe 'playlists/new' do
     render
     expect(rendered)
       .to have_selector "input[type=text][name='playlist[name]'][value=Electro]"
-    expect(rendered)
-      .to have_selector 'label[for=playlist_name]', text: 'Name'
+    expect(rendered).to have_selector 'label[for=playlist_name]', text: 'Name'
   end
 end